Turntable



M. H. RICE.

TURNTABLE. APPLICATION FILED MAR.5| I921.

Patented July 12, 1921.

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L4 aw WATTORNEYS.

M. H. RICE.

TURNTABLE.

APPLICATION FILED MAR. 5,192!- Patented July 12, 1921.

' INVEN TOR:

I I BY 7 Ah m 224 r/ucam ATTORNEYS.

UNITED STATES mm H. men, or nouns, rumors.

TURNTABLE.

Application filed March 5,

To all-whom it may concern:

Be itknown that I, MARTIN H. RICE, a citizen of the United States,residing at Moline, in the county of Rock Island and State of Illinois,have invented certain new and useful Improvements in Turntables, ofwhich the following is. a specification, reference being had to theaccompanying drawing, forming a part thereof.

This inventionrelates more particularly to portable turntables forturning motor trucks or vehicles in connection with construction worksuch as road building, where materials such as sand, gravel, crushedstone and cement, have to be transported by trucks from thenearestrailway or point of supply to the point of use, which shifts as the workprogresses.

The main objects of the invention are to provide aturntable of simple,strong, durable and comparatively-light construction, which can beeasily transferred from place to place, and operated to turn loadedtrucks around within the limits of their length for dumping; whichrequires no pit, excavation, permanent mounting or special foundation;which extends but a short distance above the ground and hence requiresbut little extra power to raise a loaded truck in running it upon theturn-table, and which admits of the use of standard shapes of steel inits construction; and generally to simplify and improve the constructionand operation of turn-tables of this class.

It consists in the construction and organization of parts as hereinafterparticularly described and pointed out in the claims.

In the accompanying drawing like characters designate the same parts inthe several figures.

Figure 1 is a plan view of a portable turntable embodying the invention,a part of one of the runways being broken away; Fig. 2 is a sideelevation of the turn-table; Fig. 3 is an enlarged vertical crosssection on the line 33, Fig. 1, of one of the trucks; Fig.

view of a portion of amodifie'cl 4 is an enlarged cross section on theline 4-4, Fig. 1, of the circular track, showing means of fastening thetrack to the runways; Fig. 5 is anenlarged cross section on the line-55, Fig. 1, o the circular track at one of the joints connecting thesections of which it is composed; Fig. 6-is a plan construction of theturn-table. A i

Referring to Figs. 1 and 2, the turn-table Specification of LettersPatent.

Patented July 12, 1921.

1921. Serial No. 449,660.

comprises a circular track 1, which is mounted on and fastened toparallel runwa s 2.

he track, which may be conveniently made of I-sectionior T-section, asshown in Figs. 3, 4 and 5, is preferably formed in two or more sections,which are rigidly con nected with eachother at the ends, as shown inFig. 5, by splice plates 4. I

The runners on which the track is-mounted, may be made of wood shod withsteel-or metal plates 6, the runners being beveled or curved upwardly atthe ends, as shown in Fig. 2, to facilitate hauling the turn-table fromplace toplace.

' At the ends the runners are provided with hauling loops or bails 7,which may be pivotally connected therewith as shown, by the shoes 6being bent backwardly over the tops of the runners and fastened thereto.

The track is fastened to the runners by any suitable means, for example,as shown in 4, b angle plates 9 bolted to opposite sides of the rail weband through the runners.

A platform comprising rigidly connected parallel runways 11, isrotatably mounted on the circular track 1.

The runways are preferably made as shown, of steel or metal channelbars, the upwardly extending flanges 12 of which serve to guide andretain the vehicle in place on the turn-table. As equivalents of theintegral channel bars, flat plates haying angle bars fastened to theiredges to form wheel guiding and retaining flanges, may obviously be usedin the construction of the runways.

The runways may be rigidly connected and held in the proper relation toeach other, as for example, by angle bar' cross pieces 13, riveted orbolted to plates 14, which are in turn riveted or bolted to the underside of the runways 11.

wheels of a To hold the platform .in place on the cirbolted to the underside of thewardly from the bars 18. iThe bars 18 are preferably curvedto correspond with the curvature'of the circular track 1, on o positesides of which they are arrange in pairs parallel with each otheradjacent the ends of the runways. The hangers 19 are preferably made asshown in Fig. 3, of standard angle bars like or similar in section tothat of the bars 18, to which they are riveted or. bolted. The wheels 16are mounted on pins or'axles 21, passing through and carried by thehangers radially with relation to the circulartrack and the center ofthe rotatable platform. I

Spacing washers 23, are placed on the axles between the hangers and thetruck wheels, as shown in Fig. 3, and anti-friction rollers 24 arepreferably interposed between the axles and the bores of the wheels.

At their ends the runways 11 are provided with vertically swingingleaves or ap-' proaches 26, hinged or pivoted thereto, as shown in Figs.1 and 2, and formed with upwardly projecting guide flanges, divergingoutwardly from the flanges 12 of the runways.

The hinged leaves or approaches 26 are preferably connected with therunways 11 by springs 29, which tend to hold them either in theirlowered position, as shown by full lines in Fig. 2, or in their elevatedposition against the wheels of a motor truck or vehicle on theturn-table, as indicated by dotted lines in the same figure.

One or both of the hin d leaves or approaches 26 at each end 0 thelatform, is

provided with a holder 31, in which a handle ar 32, indicated by dottedlines in Fig. 1, is removably fitted, to facilitate turning the platformwith a loaded truck. or vehicle thereon.

In connection with a track 1, of I-section,

having a flat head as shown in Fig. 3, the.

treads of the truck wheels are preferabl crowned, to reduce friction.With a trac of T-section having a crowned or rounded head, truck wheelsused.

The truck wheels are preferably covered by housings 34, fastened to thehangers 19, to protect them from sand, etc., which may fall on them fromloaded trucks on the turntable, and which might otherwise interfere withtheir free action and get into and cut their bearings.

In the construction shown in Figs. 1 and 2, each runway 11 is supportedat each end b two truck-wheels, one on each side thereo Referring toFig. 6, showing a modification, each runway 11 is provided at each endving flat treads may be with a sin le truck wheel 16, preferably locatedon t e outer. side thereof, and one of the angle bars 18' is extended toconnect the runways with each other, thereby taking the place of anddispensing with the separate that shown in Figs. 1 and 2.

cross pieces 13 shown in Fig. 1. The other i 1 Constructed according toeither design, a

comparatively light turn-table may be produced, which can be easily 0erated and hauled with a truck or tractor rom placeto place as the workprogresses, and which with the exception of the truck wheels, may becompletely built with standard shapes of steel, thereby greatlyfacilitating its construction and materially reducing its cost.

Various modifications other than those particularly mentioned, may bemade in the construction and arrangement of arts of the turn-table,without departing rom the principle and scope of the invention asdefined inthe following claims.

I claim:

1. In a turn-table the combination of runners, a circular track- A untedon,the runners, parallel runways, and k wheels connected with therunways alongside thereof and extending above their lower sides "inposition to run on the track and suspend mounted on said cross piecesand exten ing.

upwardly therefrom, and wheels suspending the runways from the hangersand guided on the track.

4. In a turn-table, the combination of runners, a circular track mountedthereon, connected parallel runways, truck frames consisting of an lebar cross pieces fastened to the under sicfiis of the runways andprojecting therefrom at an oblique angle thereto, angle bar hangersfastened to the upper sides of the cross pieces and extending upwardlytherefrom, wheel axles mounted in said hangers radially to the circulartrack, and

' wheels mounted on said axles and guided on said track.

5. In a turn-table the combination of run ners, a circular track fixedthereon, parallel runways provided with upwardly projecting longitudinalguide oflanges, trucks provided with wheels which are guided on thetrack and from which the runways are suspended with their lower sidesclose to the track and nected with the runways and provided alongsidethereof with wheels which are guided on the track and from which-therunways are suspended with their lower sides close to the track,vertically swinging leaf-approaches hinged to the ends of the runways,and a handle bar holder on one of the leafap roaches.

. In a turn-table the combination of parallel runners, a circular trackmounted on and fastened to the runners, connected parallelvehicle-runways, and trucks on which the runways are suspended withtheir lower sides close to the track, rovided with flanged wheelsadapted to fol ow and run on the track.

In a turn-table the combination of parallel runners, a circular I-bartrackfixedly mounted thereon and having a flat head, connected parallelvehicle-runways,

and trucks on which the runways are mounted, provided with flangedwheels having crowned treads adapted to follow and run upon the circulartrack.

In witness whereof I hereto aflix'm'y .signature.

MARTIN H. RICE.

